Material for artificial internal members of the human body



F,HAUPTMEYER. MATERIAL FOR ARTIFICIAL INTERNAL MEMBERS OF THE HUMANBODY.

' APPLICATION FILED SEPT- 3, 1920.

Inventor f I Hmme s is equal to that of the Qatar e. erase.

EDBICE HAUPTMEYER, 0E ESSEN, GERMANY.-

EATIAL roa An'rrncmr. mrnzensr. MEMBERS or ran Human sour.

emme.

Application filed September a, 1920. serial-no. mates.

Essen, Germany, has invented certain new 5 and useful Improvements inMaterial for Artificial Internal Memb'ers'of the Human Body, of Whichthefollowing is a specification.

The invention refers to artificial members organisms, in particular tosupports for teeth and means for. fastening the teeth to said supportsand consists inemploying for the manufacture of said artificial membersa chromium-nickel-steel alloy containing about 18 to 23 per centchromium, 5 to 10 per cent nickel and 0.1 to 0.4 per cent carbon. Thesealloys which reslst oxidizing and deteriorating influences of the;organism practically to the same degree as precious metals such asplatinum, gold and silver, .but which are considerably cheaper than thelatter, are capable not only to form substitutes of these preciousmetals, but they surpass them in many respects.

The tensile strength and hardness of chromium-nickel-steel, both of Vwhich are throughout greater than those of precious metals, renderitpossible to'construct artificial bone portions, mouth plates and otherelements of artificial sets of teeth as well as orthodontic apparatusfor internal adaption very light without impailing their strength anddurability. This is a considerable advantage over precious metals whosescarcity and high price has in many instances caused too light aconstruction 01" the artificial BIGIIIbQIS. to render them durable.Moreover the use of chromium-nickelthe further-"advantage that owing totheir comparatively small value, no regard need be taken of the wastewhich occurs during manufacturing so that the manufacturing methods maybe materially simplified. It is also important that chromiumnickel-steelalloys of this character when used in artificial sets of teeth have notaste and further that their ex ansion coeficient liind of porcelain tobe used internally for] human or animal steel alloys of thecharacterdescribed has Specification of Iietters Patent. Patenfi gdlJuly 4 1922 7 which is used for artificial teeth. Thus for I instance,when chromium-nickel-steel pins are burned into the porcelain crowns ofteeth, the latter are not. cracked and split by undue expansion of theins. v

Furthermore, chromium-nlckel-steel alloys when attached to artificialteeth by burning processes or the like, will not discolor the porcelainwhich is otherwise the case with every metal except latinum.

-The annexed drawlng shows for illus'tration, an upper plate in section,the palate .part a of which together with the hook b is made of thealloy of the specified character. The fastening pins 0 connecting theporcelain front a? of the teeth with the palate part a; are-also made ofthisalloy.

Claims.

1. As a new article of manufacture a porcelain tooth element, asupporting structure for said element and a connectingchromium-nickel-steel pin for attaching said porcelain element to saidstructure, said pin havlng the composition chromium -18 to 23 per cent,nickel 5 {to 10 per cent, carbon .1 to .4 percent.

2. A new article of manufacture comprising a porcelain tooth elementhaving a burnt-in chromium-nickel-steel pin of the composition chromium18 to 23 per cent, nickel 5 to 10 per cent, carbon .1 to .4 per cent.

3. In. combination with a tooth, a dental support for said tooth, saidsupport made up of the physio-logically inert chromium nickel-steelalloy, having the composition chromium 18 to 23 per cent, nickel 5 to 10per cent, carbon .1 to .4'per cent.

4:. As a new article of manufacture a porcelain crown element having aburnt-in chromium-nickeLsteel pin of the composition' chromium 18 to 23per cent, nickel 5 to 10 per cent, carbon .1 to .4 per cent.

- 5. As a new article of manufacture, an artificial member to be usedinternally for living organisms made up of a chromiumnickel-steelalloyhaving the composition chromium 18 to 23 per cent, nickel 5 to 10 percent, carbon .1 to .4' er cent. FRIEDRICH HA PTME.

